Male, straight, unshielded, 3-position M8 circular connector with screw termination and gold-plated contacts. The '1' after 'T401' indicates male gender and straight orientation, '008' refers to the M8 connector size, '03' refers to 3 positions, and the final '1' indicates gold contact plating. Indicates a standard version or packaging variant of the part number. Identifies the M8 Field Installable Circular Connector series from TE Connectivity.